Ecasound is a software package designed for multitrack audio processing. It can be used for simple tasks like audio playback, recording, and format conversions, as well as for multitrack effect processing, mixing, recording and signal recycling. It supports a wide range of audio inputs, outputs, and effect algorithms. Effects and audio objects can be combined in various ways, and their parameters can be controlled by operator objects like oscillators and MIDI-CCs. A versatile console-mode user interface is included in the package.

Echomine Muse provides an easy-to-use Java API
that gives you quick and easy access to network
collaboration services. Specifically, it allows
you to communicate with Jabber/XMPP servers to
perform instant messaging and presence management.

EGO is a program to perform molecular dynamics simulations on parallel as well as on sequential computers. Supported parallel machines include the Hitachi SR8000, CRAY-T3E, IBM-SP2, Fujitsu VPP700, Parsytec-CC under PARIX, and inhomogeneous clusters of UNIX workstations under PVM or MPI. EGO also runs sequentially on any decent UNIX workstation, even Windows95/NT PC's (with a GNU-C compiler) can be used.

The Electric Sheep screensaver realizes the
collective dream of sleeping computers from all
over the Internet. It harnesses idle computers
into a render farm for the purpose of animating
and evolving artificial organisms.

Elvis is a clone of vi/ex, the standard UNIX editor. Elvis supports nearly all
of the vi/ex commands, in both visual mode and ex mode. Elvis adds support for
multiple files, multiple windows, a variety of display modes including "hex"
and "html", on-line help, WYSIWYG printing, and other miscellaneous extensions.

EO is a templates-based, ANSI-C++ compliant evolutionary computation library. It contains classes for any kind of evolutionary computation (specially genetic algorithms) you might come up to. It is component-based, so that if you don't find the class you need in it, it is very easy to subclass existing abstract or concrete class.